Legend says this sacred tree was a gift from goddess Athena.

A sharp sculpture made of thousands of pieces of jagged glass.

This small 16th-century church in Athens is almost entirely surrounded by a modern building.

An ancient octagonal weather station named for the eight Greek gods of wind.

The Cycladic architecture makes this Athens neighborhood feel like an island paradise hidden in the shadow of the Acropolis.

This collection of 80 polarizing foods aims to challenge your subjective notions of repulsion.

A little-known cafe in an old copper bridge tower with 360-degree views of the harbor.

A museum in the building where Nazi Germany signed its surrender tells the story of World War II from the Soviet perspective.

A monument to the three wars that led to German unification towers within a Berlin traffic circle.

The site of the famous Nazi book burning campaign of 1933 remembers its "Night of Shame".

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

The most visited, and possibly most controversial, museum in Germany.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

A youth-centric science center hides an industrial triumph.